\begin{ccRefClass}{Cartesian_d} \ccInclude{CGAL/Cartesian_d.h} \ccDefinition A model for \ccc{Kernel_d} that uses \ccHtmlNoLinksFrom{Cartesian} coordinates to represent the geometric objects. In order for \ccRefName\ to model Euclidean geometry in $E^d$ , for some mathematical field $E$ (\textit{e.g.}, the rationals \Q\ or the reals \R), the template parameter \ccc{FieldNumberType} must model the mathematical field $E$. That is, the field operations on this number type must compute the mathematically correct results. If the number type provided as a model for \ccc{FieldNumberType} is only an approximation of a field (such as the built-in type \ccc{double}), then the geometry provided by the kernel is only an approximation of Euclidean geometry. \ccIsModel \ccRefConceptPage{Kernel_d} \ccSeeAlso \ccRefIdfierPage{CGAL::Homogeneous_d} \end{ccRefClass}